Abstract

A light delay path and a streak camera are combined as a dc pre-breakdown optical observation system. The light delay path in this study is a 20-m-long image guide scope (IGS). The IGS will delay the pre-breakdown light for 100 ns before reaching the streak camera. During this time, the streak camera will be triggered and a streak image of pre-breakdown light can be obtained. Previously, either an image of pre-breakdown light (weak discharge light at either one of the electrode or in the bulk of liquid sample) or an image of complete breakdown light (strong discharge light bridging across the electrodes) could be obtained by using an old system (IGS and a film camera photographic observation system). The transition process from pre-breakdown to complete breakdown light was unknown. The study is dedicated to setup and clarified the combination of the streak camera and IGS system, so that it can be used to clarify the transition process.

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